The value of a for which the equation `cos^4 theta -2cos^2 theta+a^2 = 0` has three different solution in `[0,2pi]`

The set of values of k in R such that the equation cos2 theta+cos theta+k=0 admits a solution for theta is

The solution of the equation cos^(2)theta-2cos theta=4sin theta-sin2 theta where theta in[0,pi] is

The solution of the equation cos^2theta-2costheta=4sintheta-sin2theta where theta in [0,pi] is

The number of solution the equation cos(theta)*cos(pi theta)=1 has 0(b)2(c)4(d)2

Solve the equation 3-2cos theta-4sin theta-cos2 theta+sin2 theta=0

The number of solutions of equation 3cos2 theta+5cos theta=1 in [0,2 pi] is

The number of solution of the equation sin theta cos theta cos 2 theta .cos 4theta =1/2 in the interval [0,pi]

The number of solution of the equation sin theta cos theta cos 2 theta .cos 4theta =1/2 in the interval [0,pi]

Find the number of solution of the equation 2(cos theta+cos2 theta)+sin2 theta(1+2cos theta)=2sin thetain theta in[0,3 pi]